Edge detection device and vertical glass four-edge grinding machine

Abstract

The utility model relates to an edge detection device and a vertical glass four-edge grinding machine, the edge detection device comprises a fixed part and a movable part rotatably installed on the fixed part, a cavity is arranged in the fixed part, two ends of the cavity are respectively provided with a magnetic induction sensor and a rotating shaft, and the magnetic induction sensor is connected with the rotating shaft. The output end of the magnetic induction sensor is connected with a controller of the vertical glass four-edge grinding machine; the movable part comprises a magnetic part and a detection rod connected with the magnetic part, the magnetic part is rotationally installed on the rotating shaft and located in the cavity, the magnetic induction sensor is located in the magnetic field range of the magnetic part, and the detection rod is located outside the cavity. Accurate glass position information can be obtained through the cooperation of the magnetic piece and the magnetic induction sensor, a plurality of position sensors do not need to be arranged, the structure of the device is simplified, wire rods connected with the device are reduced, the risk of water vapor corrosion is reduced, and the service life of the device is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to an edge detection device and a vertical glass four-sided grinding machine. Background Technology

[0002] Vertical glass four-sided grinding machine is an automatic processing equipment for beveling the four straight edges of rectangular glass. The grinding machine is generally equipped with a glass edge detection device, which is used to contact the glass edge and determine the position of the glass.

[0003] The detection devices in related technologies generally use inductive switches with contacts. When the glass comes into contact with the detection device, at least one inductive switch is triggered, and the position of the glass can be determined based on the triggered inductive switch. Currently, the detection devices have the following drawbacks: due to the presence of water in the processing environment, the fixing screws of the inductive switches are prone to rust and damage; furthermore, the inductive switches are contact switches, which have a short mechanical life and are prone to failure; in addition, the large number of inductive switches brings a series of inconveniences in wiring, installation, spare parts, and debugging; to ensure the accuracy of the glass position detection results, the height of the inductive switches needs to be adjusted, which can currently only be done manually, and human factors have a significant impact. Utility Model Content

[0004] To address at least one of the aforementioned technical problems, this utility model proposes an edge detection device and a vertical glass four-sided edge grinding machine.

[0005] According to some embodiments of this utility model, an edge detection device is provided, applied to a vertical glass four-sided edging machine. The edge detection device includes a fixed component and a movable component rotatably mounted on the fixed component. The fixed component has a cavity, and a magnetic induction sensor and a rotating shaft are respectively provided at both ends of the cavity. The output end of the magnetic induction sensor is connected to the controller of the vertical glass four-sided edging machine. The movable component includes a magnetic component and a detection rod connected to the magnetic component. The magnetic component is rotatably mounted on the rotating shaft. The magnetic component is located inside the cavity, and the magnetic induction sensor is located within the magnetic field range of the magnetic component. The detection rod is located outside the cavity.

[0006] Based on the above scheme, the probe contacts the glass, and the movement of the glass pushes the probe to rotate, causing the position of the magnetic component relative to the magnetic induction sensor to change. The magnetic induction sensor outputs a signal based on the change in magnetic field strength, and the controller determines the movement position of the glass based on the output signal. By using a combination of a magnetic component and a magnetic induction sensor, accurate glass position information can be obtained, eliminating the need for multiple position sensors. This simplifies the device architecture, reduces the amount of wiring, thereby reducing the risk of moisture corrosion and extending the device's lifespan.

[0007] In some possible implementations, the magnetic component includes a mounting block and two magnetic plates mounted on the end of the mounting block away from the probe rod, and the two magnetic plates do not contact each other, with the magnetic induction sensor located between the two magnetic plates.

[0008] Based on the above scheme, the magnetic field generated by the two magnets has a large range, which makes the glass position detection range large.

[0009] In some possible implementations, the magnetic sensor is a linear Hall element.

[0010] Based on the above scheme, the linear Hall element can output a signal that is linearly related to the magnetic field strength, and can accurately determine the real-time position of the glass.

[0011] In some possible implementations, the controller includes at least two comparators, each with a first input connected to the output of the magnetic sensor, and different voltage values ​​for the reference signals at the second inputs of the different comparators.

[0012] Based on the above scheme, the output signal of the magnetic induction sensor is detected by a multi-channel comparator, with each multi-channel comparator corresponding to a different glass position.

[0013] In some possible implementations, the controller further includes a variable resistor disposed on the connection line between the controller and the first input terminal of the comparator.

[0014] Based on the above scheme, the actual output level of the magnetic induction sensor can be changed by adjusting the variable resistor, thereby changing the detection position.

[0015] In some possible implementations, the magnetic sensor and its connection cable to the controller are both provided with a waterproof enclosure.

[0016] Based on the above solution, by providing waterproof encapsulation for the magnetic induction sensor and connecting wires, it is possible to prevent water splashes from causing circuit device failure, ensuring the stability of the device and extending its service life.

[0017] In some possible implementations, a protective sleeve is provided at the end of the probe rod away from the fixing member.

[0018] Based on the above solution, the end of the probe rod away from the fixing part is in long-term contact and friction with the glass. Setting a protective sleeve can prevent the probe rod from being damaged by glass wear, and can also prevent inaccurate position detection caused by wear.

[0019] In some possible implementations, the shaft is provided with a torsion spring.

[0020] Based on the above scheme, the torsion spring will provide a restoring force to the probe rod, so that the probe rod can automatically return to its initial position after the glass edging is completed and retracted.

[0021] In some possible implementations, the fixing element, the probe rod, and the rotating shaft are made of aluminum alloy or stainless steel.

[0022] Based on the above scheme, all components in the device except for the magnets and circuits are made of aluminum alloy or stainless steel, which further enhances the waterproof performance.

[0023] According to some other embodiments of the present invention, a vertical glass four-sided grinding machine is provided, including the edge detection device described in any one of the above embodiments.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the present invention.

[0025] Other features and aspects of the present invention will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions and advantages in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A first state diagram of the detection device of an edge grinding machine according to the relevant technology is shown;

[0028] Figure 2 A second state diagram of the detection device for an edge grinding machine according to related technologies is shown;

[0029] Figure 3 A perspective structural view of an edge detection device according to an embodiment of the present invention is shown;

[0030] Figure 4 This diagram shows the structure of the moving part of the edge detection device according to an embodiment of the present invention;

[0031] Figure 5 This diagram shows a cross-sectional view of an edge detection device according to an embodiment of the present invention.

[0032] Figure 6 A schematic diagram of a torsion spring in an edge detection device according to an embodiment of the present invention is shown;

[0033] Figure 7A circuit schematic diagram of a controller according to an embodiment of the present invention is shown;

[0034] Figure 8 The diagram shows the circuit connection between the edge detection device and the controller according to an embodiment of the present invention.

[0035] In the picture,

[0036] 1. Fixing component; 2. Moving component; 21. Magnetic component; 211. Mounting block; 212. Magnet piece; 22. Detector rod; 221. Protective sleeve; 3. Magnetic induction sensor; 4. Rotating shaft; 5. Torsion spring. Detailed Implementation

[0037] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or server that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or devices.

[0039] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0040] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0041] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0042] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this utility model.

[0043] The vertical glass four-sided grinding machine is an automatic processing equipment for beveling the four straight edges of rectangular glass. Its feature is that it does not require input of the length and width dimensions of the glass and can quickly grind the edges of glass of any size. The solution to achieve the above function is to install a detection device for glass edge sensing on the grinding wheel assembly. The grinding machine transports the glass down until the detection device detects that the glass has reached the preset height. The grinding machine then transports the glass horizontally and grinds it, while detecting the right-angled edges of the glass. When a glass edge is finished, the detection device will send a signal to control the grinding head to automatically rotate 90 degrees and start grinding the next edge.

[0044] Detection devices in related technologies, such as Figures 1-2 As shown, the detection device includes a detection rod and a main body. The main body is equipped with three magnetic induction switches at different heights. When the glass approaches the position to be processed, it will push the detection rod to rotate clockwise around the axis. The other end of the detection rod has a magnetic body. When the magnetic induction switch detects the magnetic body approaching, it will emit a corresponding signal to provide feedback on the glass position.

[0045] The above-mentioned detection device has the following defects: due to the presence of water in the processing environment, the fixing screws of the magnetic induction switch are prone to rust and damage; in addition, the magnetic induction switch is a contact switch with a short mechanical life and is prone to failure; and the large number of magnetic induction switches brings a series of inconveniences such as wiring, installation, spare parts, and debugging; in order to ensure the accuracy of the glass position detection results, the height position of the magnetic induction switch needs to be adjusted, which can currently only be adjusted manually, and human factors have a significant impact.

[0046] To solve the aforementioned technical problems, this utility model provides an edge detection device, which is applied to a vertical glass four-sided edging machine. Please refer to [reference needed]. Figures 3-6The edge detection device includes a fixed part 1 and a movable part 2 rotatably mounted on the fixed part 1. The fixed part 1 has a cavity, and a magnetic induction sensor 3 and a rotating shaft 4 are respectively provided at both ends of the cavity. The output end of the magnetic induction sensor 3 is connected to the controller of the vertical glass four-sided grinding machine. The movable part 2 includes a magnetic part 21 and a detection rod 22 connected to the magnetic part 21. The magnetic part 21 is rotatably mounted on the rotating shaft 4. The magnetic part 21 is located inside the cavity, and the magnetic induction sensor 3 is located within the magnetic field range of the magnetic part 21. The detection rod 22 is located outside the cavity.

[0047] Based on the above structure, the vertical glass edging machine moves the glass downwards until the probe 22 contacts the glass. The movement of the glass pushes the probe 22 to rotate, causing the position of the magnetic component 21 relative to the magnetic induction sensor 3 to change. The magnetic induction sensor 3 outputs a signal based on the change in magnetic field strength, and the controller determines the movement position of the glass based on the output signal. Compared with detection devices in related technologies, the edge detection device in this embodiment can obtain accurate glass position information by setting the magnetic component 21 and the magnetic induction sensor 3 together. It does not require setting multiple magnetic induction switches. The magnetic component 21 and the magnetic induction sensor 3 are both set in the inner cavity of the fixing component 1 and do not contact each other, so there will be no wear, and they are not prone to failure. This helps to simplify the structure of the device, reduce the wiring of the device connection, reduce the risk of water vapor corrosion, and extend the service life of the device.

[0048] In this invention, the magnetic component 21 includes a mounting block 211 and two magnetic pieces 212. The mounting block 211 is rotatably mounted on the rotating shaft 4. The two magnetic pieces 212 are mounted on the end of the mounting block 211 away from the detection rod 22, and the two magnetic pieces 212 do not contact each other. The magnetic induction sensor 3 is located between the two magnetic pieces 212. Based on the above structure, the positions of the two magnetic pieces 212 are fixed, and the magnetic field generated between the two magnetic pieces 212 is fixed relative to the position of the mounting block 211. As the detection rod 22 drives the mounting block 211 to rotate, the magnetic field generated between the two magnetic pieces 212 rotates synchronously. Because the magnetic field generated by the two magnetic pieces 212 has a large range, the magnetic induction sensor 3 is always located between the two magnetic pieces 212, which can ensure the accuracy of the glass position detection result.

[0049] It is understandable that the greater the distance between the two magnet pieces 212, the larger the range of glass positions that can be detected. Preferably, the two magnet pieces 212 are not parallel, that is, the two magnet pieces 212 can be arranged in a fan shape to further increase the range of rotation angles, so as to avoid the magnet pieces 212 from coming into contact with the magnetic induction sensor 3 after the mounting block 211 rotates.

[0050] This embodiment does not limit the specific selection of the magnetic induction sensor 3. Based on the above, it can be seen that the magnetic induction sensor 3 is always located in the magnetic field generated by the two magnet pieces 212. As the probe rod 22 rotates, the position of the magnetic induction sensor 3 in the magnetic field changes. Therefore, the magnetic induction sensor 3 should output different signals according to the change in the magnetic field strength.

[0051] In one specific embodiment, the magnetic induction sensor 3 is configured as a linear Hall element. A linear Hall element can detect changes in magnetic field strength and output a linear voltage signal proportional to the magnetic field strength. It offers advantages such as high precision, non-contact detection, strong anti-interference capability, high sensitivity, low power consumption, and small size. When the magnetic induction sensor 3 is a linear Hall element, the change in the intensity of the magnetic field generated between the two magnet pieces 212 should be unidirectional.

[0052] In traditional detection devices, the fixing screws of magnetic induction switches are exposed for easy manual adjustment, making them susceptible to corrosion from moisture. In this invention, however, the magnetic induction sensor 3 and the magnetic component 21 are both located inside the fixing component 1, and the screw mounting parts are also located inside the fixing component 1, thus reducing the risk of corrosion.

[0053] To further improve waterproof performance and prevent moisture from causing the magnetic induction sensor 3 to malfunction or become inaccurate, in some embodiments, the magnetic induction sensor 3 and its connection cable to the controller are provided with waterproof encapsulation. This waterproof encapsulation refers to encapsulating the magnetic induction sensor 3 and the connection cable with a waterproof material. This embodiment does not limit the specific type of waterproof material; for example, the waterproof material can be epoxy resin.

[0054] In some embodiments, corresponding waterproofing solutions can also be provided for non-electrical components. Specifically, the fixing member 1, the detection rod 22, the rotating shaft 4 in the fixing member 1, and the mounting block 211 in the magnetic component 21 are all made of waterproof and rust-proof materials, such as aluminum alloy, stainless steel, or other similar materials. In one specific embodiment, in order to reduce costs, the fixing member 1, the detection rod 22, and the rotating shaft 4 are made of aluminum alloy or stainless steel.

[0055] As can be seen from the above embodiments, in the edge detection device of this utility model, the detection rod 22 is in direct contact with the glass. The glass first descends and touches the detection rod 22. The detection rod 22 is pressed down and rotated by the glass until the glass reaches a specified height. Then the glass moves laterally, and the detection rod 22 continues to contact and rub against the edge of the glass.

[0056] To protect the probe 22 and the glass edge, in some embodiments, a protective sleeve 221 is provided at the end of the probe 22 away from the fixing member 1. The protective sleeve 221 directly contacts the glass edge, protecting both the probe 22 and the glass edge to prevent damage. This embodiment does not limit the material of the protective sleeve 221; in some cases, it can be configured as a copper sleeve, as copper is relatively soft and has good wear resistance, achieving the aforementioned protective purpose.

[0057] In this invention, the edge detection device has an automatic rebound function. After the glass has completed the edge grinding on one side, the glass detaches from the detection rod 22, and the detection rod 22 rotates counterclockwise. The magnetic induction sensor 3 detects the change feedback signal of the detection rod 22, and the controller determines that the edge grinding on one side of the glass is complete based on the signal. The automatic rebound function can be based on gravity, that is, the weight of one end of the magnetic component 21 is greater than the weight of the detection rod 22. When the detection rod 22 is not subjected to external force, the detection rod 22 always remains in the initial upper position.

[0058] In some embodiments, the automatic rebound function can also be implemented based on a torsion spring. Specifically, a torsion spring 5 is provided on the rotating shaft 4, which provides a counterclockwise rotational force to the probe 22. After the probe 22 is disengaged from the glass, the torsion spring 5 drives the probe 22 back to its initial position. Based on the torsion spring 5, the rebound speed can be improved, ensuring that the probe 22 rebounds into place.

[0059] like Figure 7 and Figure 8 As shown, in this invention, the edge detection device uses only one sensor, while the position detection function is centralized in the controller. The controller includes at least two comparators. The first input terminal of each comparator is connected to the output terminal of the magnetic induction sensor 3, and the second input terminal of each comparator is connected to a reference signal. Different comparators have different reference signals at their second input terminals. Based on the above circuit structure, the signal output by the magnetic induction sensor 3 is related to the rotation angle of the detection rod 22. The rotation angle of the detection rod 22 corresponds to the height of the glass edge. That is, the magnetic induction sensor 3 outputs different signals when the glass is at different heights. Multiple comparators are set, and the reference signal of each comparator corresponds to a height. When the output signal of the magnetic induction sensor 3 is the same as one of the reference signals, it indicates that the glass has reached the corresponding height.

[0060] In one specific implementation, the magnetic induction sensor 3 is configured as an OH49E linear Hall element. The OH49E linear Hall element is voltage-driven and outputs a current signal. The magnitude of the output current signal is linearly related to the strength of the induced magnetic field. The comparator is configured as a voltage comparator, and a resistor is directly connected between the OH49E linear Hall element and the voltage comparator. The current signal output by the OH49E linear Hall element is applied across the resistor, giving the resistor a voltage. By comparing the voltage of the resistor with the voltage of the reference signal of the voltage comparator, the position can be determined. Three voltage comparators are used, corresponding to the initial position (not in contact with the glass), the edge-grinding position (the glass edge matches the height of the grinding wheel), and the abnormal position (the glass edge is not at the same height as the grinding wheel).

[0061] Based on the above embodiments, in some cases, the size or position of the grinding wheel may change, and correspondingly, the detection height of the edge detection device must also change. To facilitate adjustment of the detection height, the aforementioned resistor can be configured as a variable resistor. That is, the controller also includes a variable resistor, which is set on the connection line between the controller and the first input terminal of the comparator. By adjusting the variable resistor, the actual output level of the magnetic induction sensor 3 can be changed, thereby changing the detection position. Preferably, to reduce the difficulty of adjustment, the variable resistor can be configured as an electronic potentiometer. The electronic potentiometer can adjust the resistance value based on a digital signal, and it can be connected to an industrial control computer or other control terminal, which helps to realize automated detection and adjustment.

[0062] In other embodiments, in addition to setting a variable resistor, multiple adjustable power supplies can also be set. The multiple output channels of the multiple adjustable power supplies are respectively connected to the second input terminal of different comparators. By adjusting the reference signals of different comparators, the purpose of adjusting the detection position can also be achieved.

[0063] This utility model also provides a vertical glass four-sided grinding machine, including the edge detection device described in any of the above embodiments.

[0064] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An edge detection device, applied to a vertical glass four-sided edging machine, characterized in that, The edge detection device includes a fixed component and a movable component rotatably mounted on the fixed component. The fixing component has a cavity, and a magnetic induction sensor and a rotating shaft are respectively provided at both ends of the cavity. The output end of the magnetic induction sensor is connected to the controller of the vertical glass four-sided grinding machine. The movable component includes a magnetic component and a probe rod connected to the magnetic component. The magnetic component is rotatably mounted on the rotating shaft. The magnetic component is located inside the cavity, and the magnetic induction sensor is located within the magnetic field range of the magnetic component. The probe rod is located outside the cavity.

2. The edge detection device according to claim 1, characterized in that, The magnetic component includes a mounting block and two magnet pieces. The two magnet pieces are mounted on the end of the mounting block away from the probe rod and do not contact each other. The magnetic induction sensor is located between the two magnet pieces.

3. The edge detection device according to claim 2, characterized in that, The magnetic induction sensor is a linear Hall element.

4. The edge detection device according to claim 3, characterized in that, The controller includes at least two comparators, each of which has a first input terminal connected to the output terminal of the magnetic induction sensor, and the reference signal voltage values ​​at the second input terminals of the different comparators are different.

5. The edge detection device according to claim 4, characterized in that, The controller also includes a variable resistor, which is disposed on the connection line between the controller and the first input terminal of the comparator.

6. The edge detection device according to claim 1, characterized in that, The magnetic induction sensor and its connection cable to the controller are both provided with waterproof encapsulation.

7. The edge detection device according to claim 1, characterized in that, A protective sleeve is provided at the end of the probe rod away from the fixing member.

8. The edge detection device according to claim 1, characterized in that, The shaft is equipped with a torsion spring.

9. The edge detection device according to claim 1, characterized in that, The fixing component, the probe rod, and the rotating shaft are made of aluminum alloy or stainless steel.

10. A vertical glass four-sided grinding machine, characterized in that, The edge detection device includes any one of claims 1-9.

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